Synthesis, characterization, and photocatalytic properties of BiOBr catalyst
Synthesis, characterization, and photocatalytic properties of BiOBr catalyst
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BiOBr催化剂的合成、表征及光催化性能
DOI：
10.1016/j.jssc.2012.12.031
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发表时间：
2013-03
影响因子：
3.3
通讯作者：
Yongqing Chi
中科院分区：
文献类型：
--
作者：
Caimei Fan;Xiaowen Wang;Xiaogang Hao;Yongqing Chi
采用易水解法制备了BiOBr光催化剂，并用x射线衍射、扫描电镜、n2吸附等温线和漫反射光谱对其进行了表征。结果表明，制备的BiOBr光催化剂为四边形晶体结构，颗粒均匀，呈细铁氧体片状，比表面积为32.19m2/g，带隙为2.92eV。在氙灯照射下，研究了BiOBr对水溶液中亚甲基橙（MO）的光催化性能及机理。结果表明，在氙灯照射下，BiOBr粉末的最佳用量为0.8g/L，其催化性能与P25-TiO2相当。机理研究表明，光生孔和•OH在光催化降解中起重要作用。对腐植酸、亚甲基蓝和MO在水溶液中的光催化降解结果进一步验证了BiOBr的高催化活性和非选择性。
BiOBr photocatalyst was prepared by a facile hydrolysis method, and then characterized by X-ray diffraction, scanning electron microscopy, N2sorption isotherms, and diffuse reflectance spectroscopy. The as-prepared BiOBr photocatalyst was found to be a tetragonal crystal structure, homogeneous particles of fine ferrite plates, surface area of 32.19m2/g, and band gap of 2.92eV. The photocatalytic property and mechanism of BiOBr were investigated by the degradation of methylene orange (MO) in aqueous solution under xenon lamp irradiation. The results indicated that the optimum amount of BiOBr powder was 0.8g/L for MO degradation under xenon lamp irradiation, and its catalytic performance was as good as that of P25-TiO2. The mechanism study showed that photogenerated holes and •OH played important roles in photocatalytic degradation. The photocatalytic degradation results of humic acids, methylene blue, and MO in aqueous solution further verified the high catalytic activity and non-selectivity of BiOBr.
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影响因子：
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作者：
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通讯作者：
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影响因子：
3.3
作者：
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影响因子：
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作者：
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作者：
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